Catcher signal to manager - How do you deal?

[TussAgee11]

Doing the best summer baseball around here, full of kids who play college ball or older guys who never made it out of A or AA.

Here's the sitch - a close pitch that I called ball. Catcher was calling his own game. He throws the ball back, looks into the dugout, and subtly slaps his shin guard.

Obviously, he's letting the manager know what he thought of the pitch.

How would you deal with this?

Here's what I did...

Me: "Does tapping your leg mean good call or bad call?"
F2: "Huh?"
Me: "On that close pitch, you letting your manager know what you thought?"
F2: "Just communicating"
Me: "Ok"

Critiques?